Fuel pump hand priming



Feb. 19, 1935. I M BAB-CH 1,991,537

' FUEL PUMP HAND PRIMING 1 Filed Nov. 24, 1930 2 Sheets-Sheet l 77 gwvanto'o Feb. 19, 1935. A. M. BABlTcH I 1,991,537

FUEL PUMP HAND PRIMING Filed Nov. 24, 1950 2 Sheets-Sheet 2 Patentes ret. r9, 1935.! 1,991,537'

UNITED STATES PATENT OFFICE FUEL PUMP HAND PRIMING Abraham M. Babitch, Flint, Mich.

Application November 24, 1930, Serial No. 497,748

1 Claim. (Cl. 103-207) This invention relates to fuel pumps and more A lever 53 is pivoted at 55 to the pump body. particularly has been designed to facilitate the 'I'he lever projects through the two openings 49 hand priming of such a pump. and 51, and is held/in contact with a cam 57 of An object of the invention is to provide an inthe camshaft 59 by a spring 61 engaging its expensive hand priming instrumentality, and it end. A suitable closure member 63 covers the 5 also provides for such a modification of convenbottom portion of body 9 and is held in position tional pump structure as to adapt it for the asby fastening means 65. A portion 62 of the sociation of a hand priming handle. closure member 63 is bent inwardly to serve' as Other` objects and advantages will be undera centering means and retainer for spring 61,

stood from the following specification and acthe other end of which spring is seated in a 1o companying drawings. l i disc 67 engaging the end of the lever 53. The In' the drawingslower end of plunger 39 seats within a depres- Fig. 1 is a view in vertical section showing one sion of a similar disc 69 which latter disc serves specic embodiment of the invention. as anrabutment for a spring/ 71, which latter Fig. 2 is a sectional View on line 2-2 of Fig. 1. spring is also positioned 'by an indented f por- 15 Fig. 3 is'a perspective ofthe priming handle. tion 73 of closure 63.' Spring 71 serves in an Fig. 4 shows in side eleyation, partly-inlsecfobvieusmanner to operate through the plunger tion, a pump. of somewhat diierent eonstrucand diaphragm to make a discharge stroke. tion, this pump having the similarly formed Cooperating with the lever 53 and the pump priming handle associated therewith. I plunger 39 to make the suction stroke, there is 20 Fig. 5 is a section on line 5-5 of Fig. 4. a double link 75. The two links 75 are pivotally Fig. 6 shows in vertical section a third form connected by a rivet 76 to the flat sidesof the of pump with the hand priming handle assoplunger`39. The two links are alsol pivoted on ciated therewith. the pin-55. To provide suitable lost motion Fig. 7 is a section on line 7--7 of Fig. 6. between .the lever 53 and the double link 75 the 25 Fig. 8 is a perspective of a portion of the pump lever is shaped as shown in dotted lines in Fig. 1, this figure intending to illustrate the pivotal supand is arranged toat times engage a pin 60 carporting arrangement for the priming handle. ried by the links 75. The two links then move Referring to Figs. 1 to 3 inclusive, numeral 9 together with the lever, and the plunger 39 is represents the main body of the pump which is drawn down to make a suction stroke. Itwill 30 preferably formed by the process of die casting. be seenfthat owing to this lost motion connection Numeral 11 represents the pump cover'. A This .the'lver 53 is free to operate under the inuence cover is also integral with the cover or cap for lof the cam 57 and the spring 61 without producthe filter cup 13, the cup being held to the capv ing movement of the plunger when the plunger is by fastening means 15. The cover 11 has an already in the position corresponding with the 35 opening 17 .fordmitting fuel which is to passv high pressure condition at the outlet valve. This. through the opening 19 to that region of the action is well known in variablestroke pumps of cup 13 below the filtering member 21, this lterthis kind, and no invention is being claimed'for4 ing member being located at the top of the cup. the same in this application. i The fuel then passes through the lter 21 and lAt its edges the wall of the body 9 is recessed 40 through a pump inlet valve 23 and the passage at two points as shown by numeral 77 in Figs. 1 25 to the pump chamber 27. VFrom the pump and 2. Pivoted in these recesses is the hand chamber 27 the fuel passes by way of lvalve 29 to primer handle illustrated in perspective in Fig. the outlet 31. 'I'his outlet is intended to be con- 3. This primer, representedas. a whole by nunected by a conduit as usual Withthe carburetor. meral 70, may be formed from a single length of 45 The pump chamber 27 is closed byv a diaphragm stiff .wire or the like bent at its mid portion to 33 held'in position between the adjoining parts form two symmetrical arms. Each arm is bent of the body 9 and the cover 11. To the diaphragm to form an angular portion 79. These angular Awith its discs 35 and 37 is secured a plunger 39 portions are the parts which are pivoted in the 5Q which extends through 'an opening 41 in a wall recesses 77. Beyond the angular portion 79 each 50 43 which divides the body 9 into two chambers, an arm is extended as at 81 and then terminates in upper chamber 45 and a lower chamber 47. 'I'he .an inward end 83. These ends 83 closely appump body has an opening 49 registering with proach each other andoverlie the upper edges an opening 51 in the engine crankcase, a part of the links 75. The portions 81 lie along the of which is represented by numeral 50 in Fig. 1. sides ofthe plunger as shown in Fig. 2. This f hand priming handle is so dimensidned that the weight of the part outside the body 9 holds it in the position shown such that thefinner end is not in engagement with links during the normal action of the pump. It will be understood that the closure 63 when securedin position holds the priming member in operative position with the portions 79 in the recesses '77.-

Should it be necessary to prime the pump the operator grasps the end or bight portion of the' handle and rocks it about its pivot, thereby en' gaging thev ends 83 with the links 75. lThe plunger is thereby depressed to make a suction stroke. The spring 71 upon the release of pressure on the handle makes a discharge stroke. This action is repeated to whatever extent may be necessary.

Figs. 4 and 5 show a slight modification. In these figures the body 19 diiers from the body 9 of Fig. 1 in that the slotsto receive the priming handle are omitted. The closure 163 is like its counterpart 63 except that it is provided with slots 177 for the pivotal support of the priming handle. In other respects this form corresponds with that shown by Fig. 1, and similar reference characters are 'used to designate the similar parts.

In Figs. 6, 7, and 8 is shown a form of pump wherein the body is cast integrally with the counterpart of the bottom closure member of the other forms of the invention. This necessitates a somewhat modif-led provision for adding the priming handle. In this form of the invention the body 209 is formed with an integral tubular portion 211 for the passage of the plunger 213 which is connected to the diaphragm as in the forms already described. The parts abovethe diaphragm may be the same as before. Aspri-ng 215 surrounds the plunger 213 and engages a disc 217 at the diaphragm end of the plunger. This spring also surrounds the part 211 and seats on the iiange 219 surrounding the tubular member. Adjacent the base of the member 211 is an angularly located positioning lug 221 for a spring 223. The other end of the spring engages the operatinglever 225 being held in position by a lug 227. The lever 225, it will be understood, is to be-operated by the engine cam as usual against the action of the spring 223. In so moving, the extremity of the lever 229 beyond the pivot 231 is adapted to engage a link 233 having a forked end rotatable on pivot 231. This link also has an interlocking connection as shown at 235 with the lower end of the plunger 213. A slot 237 is formed in the body as shown in Fig. 8. The manually' operable priming lever is the same as before'. Its pivotal regions are received within the slot, the longer end projecting downwardly on the outside while the shorter arm extends inwardly through slot 237 where it is positioned to at times engage and depress the link 233, and thereby produce a suction pump stroke through the instrumentality of the plunger rod 213. In order to hold the primer handle in position a plate 239 is secured over the slot by fastening means 241. f

In each of these forms the simple priming handle or lever remains out of contact with the pump operating mechanism owing to the relatively greater weight of its outside arm. In each case the work arm is positioned to engage the member or link between the cam operated lever and the plunger. In each case the assembly and removal is extremelyv simple. The slight differences are merely slight modications, or are made to accommodate pumps of slightly different form. In Figs. 1 and 4 the optional design of pivoting the priming handle to the body or other bottom closure is to be observed. In Fig. 6 where the pump body is made as an integral whole the 'primer is pivotally supported ina. slot, and a separate but inexpensive plate isusedt cover the slot and hold the primer in position.

I claim:

In a pump, a casing, pump-operating mechanism in said casing, a manually operable priming member having an inner arm to engage said mechanism 'and an outer heavier arm to' act by gravity tohold said inner arm from contact with said mechanism, said member being of U-shape with its arms bent into parts angularly related to each other, there being pivot portions between said parts and said casing formed with slots to receive said pivot portions.

ABRAHAM M. BABITCH. 

